- R&D
- R-ADSL
- R-BGAN
- r-card
- R-pixel
- R-Value
- R-Y
- R/2
- R/3
- R10000
- R3000
- R4000
- R5000
- R8000
- R:BASE 2000
- R:BASE System
- RAB
- RAC
- RACE
- race condition
- RACE encoding
- racetrack memory
- RACF
- rack
- rack mounted
- rack server
- rack unit
- rack-mounted server
- RAD
- rad hard
- rad hardened
- RAD tool
- radar
- RADEON
- Radia
- radiation hardened
- radio
- radio buttons
- radio controlled
- radio frequency
- radio frequency ID
- radio frequency identification
- radio frequency interference
- radio frequency remote control
- radio ID
- radio ID tags
- radio interface
- radio remote control
- Radio Shack
- radio signal
- radio spectrum
- radio wave
- radiolocation
- radiophone
- RadioShack
- radiosity
- radiotelephone
- radiotelephony
- radiovision
- RADIUS
- radix
- radix point
- RADSL
- RAFT
- rage
- ragged right
- RAID
- RAID 0
- RAID 1
- RAID 10
- RAID 5
- RAID Advisory Board
- RAID controller
- RAID parity
- rail
- Rain Doll algorithm
- Rainbow
- Rainbow Series
- RAM
- RAM cache
- RAM card
- RAM chip
- RAM cram
- RAM disk
- RAM doubler
- RAM latency
- RAM Mobile
- RAM network
- RAM parity
- RAM refresh
- RAM resident
- RAMAC
- Raman amplifier
- Rambus
- Rambus DRAM
- RAMDAC
- Ramdrive
- RAMIS
- RAMP-C
- random access
- random access memory
- random noise
- random number generator
- range
- RangeLAN
- ranking
- ransom note typography
- ransomware
- rapid 3D printing
- rapid application development
- Rapid BIOS Boot
- rapid manufacturing
- rapid prototyping
- rapid sort
- RapidCAD
- RapidIO
- RAPPORT
- RARP
- RAS
- raster
- raster display
- raster graphics
- raster image processor
- raster scan
- raster scan display
- rasterize
- RAT
- rate stretch tool
- ratiometric
- Rational Apex
- Rational Rose
- raw
- raw capacity
- raw data
- RAW file
- Raw Iron
- raw socket
- ray tracing
- RBASE
- RBHC
- RBL
- RBOC
- RC
- RC algorithms
- RC1
- RC2
- RC4
- RC5
- RC6
- RCA
- RCA connector
- RCA jack
- RCA plug
- rcard
- RCD
- RCDD
- RCS
- Rdb
- RDBMS
- RDDL
- RDF
- RDF Schema
- RDFS
- RDIF
- RDMA
- RDMA Over IP
- RDO
- RDP
- RDRAM
- RDS
- re-entrant code
- Reachout
- read
- read channel
- read cycle
- read error
- read notification
- read only
- read receipt
- read rights
- read the f***ing manual
- read-only attribute
- read-only memory
- read-only rights
- read-while-write
- read/write
- read/write channel
- read/write head
- read/write memory
- read/write rights
- reader
- readme file
- readout
- ReadyBoost
- ReadyDrive
- real address
- Real Audio
- Real Mode
- Real Mode code
- Real Mode driver
- real storage
- real time
- Real Video
- real-time audio
- real-time chat
- real-time clock
- real-time communications
- real-time compression
- real-time conferencing
- real-time credit card processing
- real-time image
- real-time information system
- real-time operating system
- real-time operation
- real-time rendering
- real-time system
- real-time video
- RealAudio
- Realizer
- RealJukebox
- RealMagic
- RealMedia
- RealNetworks
- RealOne
- RealPC
- RealPlayer
- realtime
- realtime audio
- realtime chat
- realtime clock
- realtime communications
- realtime compression
- realtime conferencing
- realtime credit card processing
- realtime image
- realtime information system
- realtime operating system
- realtime operation
- realtime rendering
- realtime system
- realtime video
- RealVideo
- RealVNC
- rear screen TV
- rear screen-projection TV
- rear-projection TV
- reasonable test
- REBOL
- reboot
- reCAPTCHA
- receiver
- recipient
- reciprocal link
- recommendation system
- recommender system
- recompile
- reconfigurable computing
- reconfigure
- record
- record format
- record head
- record layout
- record locking
- record mark
- record modes
- record number
- record player
- recordable CD
- recordable DVD
- records management
- recordset
- recovery
- recovery console
- recovery disk
- recovery program
- recruiter information
- rectangular pixel
- rectifier
- recurse subdirectories
- recursion
- recursive
- recursive acronym
- recycle bin
- recycling old computers
- Red Book
- Red Book audio
- red eye
- red eye removal
- red green blue
- Red Hat
- redact
- redaction
- redirect server
- redirection
- redirector
- redlining
- redo
- redraw
- redundancy
- redundancy check
- redundant
- redux
- Redwood
- ReelMagic
- reengineering
- reentrant code
- refactor
- refactoring
- refarming
- reference design
- reference monitor
- referential integrity
- referrer
- reflection
- reflection mapping
- reflective
- reflective art
- reflective LCD
- reflective media
- Reflective Memory
- reflective spot
- reflective VGA
- reflow
- reflowable text
- reformat
- refraction
- refractive index
- refresh
- refresh rate
- Regatta
- REGEDIT.EXE
- regen
- regenerator
- regex
- regexp
- region codes
- Regional Internet Registry
- ReGIS
- register
- register level compatibility
- registrant
- registrar
- registration
- Registry
- Registry cleaner
- regression analysis
- regression testing
- regular expression
- REGZA-LINK
- reimaging
- reinstall
- reintermediation
- related files
- relational
- relational algebra
- relational calculus
- relational database
- relational DBMS
- relational model
- relational operator
- relational query
- relative address
- relative link
- relative movement
- relative path
- relative reference
- relative URL
- relative vector
- RELAX NG
- relay
- Relay Gold
- release
- release candidate
- reliability
- Reliable HTTP
- Reliant
- reload
- relocatable code
- relying party
- Rem
- rem it out
- rem'd out
- remailer
- remanence
- remap
- remapped
- remaster
- remedial maintenance
- remmed out
- remote
- remote access
- remote access concentrator
- remote access router
- remote access server
- Remote Access Service
- remote access software
- remote batch
- remote boot
- remote bridge
- remote call forwarding
- remote communications
- remote console
- remote control
- remote control software
- Remote Data Services
- Remote Desktop
- Remote Desktop Protocol
- remote drive
- remote echo
- remote emergency boot
- remote host
- Remote Imaging Protocol
- remote invocation
- remote job entry
- remote new system startup
- remote node
- remote procedure call
- remote resource
- remote sensing
- remote startup
- remote wake-up
- remote-office router
- remoting
- removable disk
- removable drive
- Renaissance CS
- render
- renderable text
- rendering
- RenderMan interface
- Rendezvous
- Renovator
- reparse point
- repeater
- repetitive brain injury
- repetitive strain injury
- replay attack
- ReplayTV
- Replica
- replication
- replicator
- report
- report file
- report format
- report generator
- report program generator
- report writer
- repository
- reproducer
- reprographics
- repudiation
- repurpose
- request for price quotation
- request for proposal
- request to send
- Requester
- requirement
- requirements
- requirements management
- resampling
- rescan peripherals
- ResEdit
- reseller
- reserved memory
- reserved word
- reset button
- resident module
- resident program
- resident protection
- residential gateway
- residual current device
- resiliency
- resilient
- resilient packet ring
- resistance RAM
- resistive screen
- resistor
- resistor-transistor logic
- resolution
- resolve
- resolver
- resource
- resource compiler
- resource discovery
- resource fork
- resource manager
- resource record
- resource requirements
- response time
- responsibility
- REST
- restart
- restore
- restore point
- restricted function
- results set
- retrieve
- retro
- retrocomputing
- retrotech
- retrovirus
- return
- return code
- return key
- retweet
- retweeting
- reusability
- REV disk
- reverse 3:2 pulldown
- reverse bias
- reverse DNS
- reverse engineer
- reverse link
- reverse Polish notation
- reverse print
- reverse proxy
- reverse proxy server
- reverse telecine
- reverse video
- revision level
- rewritable
- rewritable magnetic media
- rewritable optical disc
- rewritable optical disk
- rewritable optical media
- REXX
- RF
- RF base station
- RF in
- RF modulation
- RF out
- RF receiver
- RF remote
- RF remote control
- RF shielding
- RF stage
- RF weapon
- RF/ID
- RFC
- RFI
- RFID
- RFID card
- RFID inlay
- RFID interrogator
- RFID printer
- RFID reader
- RFID smart label
- RFID tag
- RFID-blocking wallet
- RFP
- RFS
- RFT
- RG
- RGB
- RGB color
- RGB monitor
- RGB triplet
- RGBA
- RGBHV
- Rhapsody
- rheostat
- RHYTHM
- RIA
- RIAA
- RIAA curve
- RIAA equalization
- ribbon cable
- rich client
- rich client application
- rich content
- rich e-mail
- rich formatting
- rich Internet application
- rich media
- rich presence
- Rich Site Summary
- rich text
- rich Web application
- rich Web client
- rich Windows client
- RichLink
- Ricochet
- RIFF
- right click
- right justify
- right-reading
- Rights Manager
- rightsizing
- rigid disk
- Rijndael algorithm
- RIM
- RIMM
- ring
- ring network
- ringtone
- Rio
- RIP
- RIPE NCC
- ripper
- ripping
- RIR
- RISC
- RISC System/6000
- RISC System/6000 SP
- RISC-based
- RISC-based system
- riser card
- risk
- risk analysis
- risk assessment
- risk management
- Rivest-Shamir-Adleman
- RJ-11
- RJ-14
- RJ-21
- RJ-25
- RJ-45
- RJ-48
- RJ11
- RJ14
- RJ25
- RJ45
- RJ48
- RJE
- RL
- RLE
- RLL
- RLL interface
- rlogin
- RM
- RMA
- RMI
- RMI over IIOP
- RMI/IIOP
- RMON
- RMON probe
- RMS
- rn
- RNG
- RNI
- RO
- RO terminal
- road rage
- road warrior
- roadcasting
- Roadrunner
- roaming
- robbed bit signaling
- robo call
- RoboCAD
- robocall
- robot
- robotic surgery
- robotics
- robots exclusion
- robots.txt
- Robson
- Robson cache
- Robson flash memory
- robust
- ROC
- Rock Ridge file system
- Rocket eBook
- RocketBook
- ROCOF
- ROFL
- ROFLMAO
- rogue access point
- rogue site
- rogue Web site
- RoHS
- ROI
- ROKSO
- Roku
- Roku Soundbridge
- ROLAP
- role playing game
- role-based access control
- roll in/roll out
- rollback
- rollover
- ROM
- ROM BIOS
- ROM BIOS swapping
- ROM card
- ROM emulator
- ROMable
- roman type
- ROMB
- root
- root directory
- root domain
- root key
- root kit
- root mean square
- root server
- rootkit
- ROP
- Rosetta
- RosettaNet
- rot13
- rotating ad
- rotational delay
- rotoscope
- rotoscoping
- round
- round robin
- round robin DNS
- round trip
- round tripping
- rounding
- routable protocol
- route dampening
- route miles
- route poisoning
- route server
- router
- router cache
- router cluster
- router droppings
- router protocol
- router table
- router vs. switch
- routine
- routing
- Routing Information Protocol
- routing loop
- routing protocol
- routing switch
- routing table
- row
- ROWE
- RP
- RPC
- rPerf
- RPG
- RPGLE
- RPM
- RPN
- RPQ
- RPR
- RPTV
- RR
- RRAM
- RRAS
- RS-170
- RS-232
- RS-422
- RS-423
- RS-449
- RS-485
- RS-530
- RS-MMC
- RS/6000
- RS/6000 SP
- RS232
- RS64
- RSA
- RSAC
- RSCS
- RSDL
- rsh
- RSI
- RSIP
- RSIP gateway
- RSMMC
- RSS
- RSS feed
- RSS syndication
- RSS viewer
- RSTP
- RSTS/E
- RSVP
- RSX-11
- RT
- RT PC
- RT-11
- rt-VBR
- RTC
- RTC/BIOS fix
- RTCP
- RTE
- RTF
- RTFM
- RTL
- RTM
- RTO
- RTOS
- RTP
- RTS
- RTSP
- RTTI
- RTTTL
- RTU
- RTUA
- RTW
- RU
- rubber banding
- rubout key
- Ruby
- Ruby on Rails
- rugged PC
- ruggedized PC
- rule based
- rule-based expert system
- ruler line
- rules
- rules based
- RUMBA
- Rumbaugh
- run
- run around
- Run As
- run length encoding
- run length limited
- run native
- run on top of
- run time
- run time engine
- run time environment
- run time error
- run time library
- run time version
- run under
- run-of-network
- run-of-site
- runt
- runt filtering
- runtime
- runtime engine
- runtime environment
- runtime error
- runtime library
- runtime module
- runtime version
- RUP
- RVP
- RW
- RWIN
- RX
- RXD
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